linux-kernel - Re: [PATCH v3 1/2] printk: Fix panic caused by passing log_buf

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Message-ID: <20180925113840.GA523@tigerII.localdomain>
Date:   Tue, 25 Sep 2018 20:38:40 +0900
From:   Sergey Senozhatsky <sergey.senozhatsky@...il.com>
To:     zhe.he@...driver.com
Cc:     pmladek@...e.com, sergey.senozhatsky@...il.com,
        rostedt@...dmis.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH v3 1/2] printk: Fix panic caused by passing log_buf_len
 to command line

On (09/22/18 23:40), zhe.he@...driver.com wrote:
> @@ -1048,7 +1048,14 @@ static void __init log_buf_len_update(unsigned size)
>  /* save requested log_buf_len since it's too early to process it */
>  static int __init log_buf_len_setup(char *str)
>  {
> -	unsigned size = memparse(str, &str);
> +	unsigned int size;
> +
> +	if (!str) {
> +		pr_err("boot command line parameter value not provided\n");
> +		return -EINVAL;
> +	}

Hmm, I thought we agreed on dropping this error print out. It's not exactly
useful; we still have the default buffer size.

	-ss